Fuel system

This includes the replacement of fuel filters, fuel injectors, fuel pumps (in tank or external). Also this includes wrong fuel e.g. putting petrol in a diesel vehicle and vice versa. Most diesel cars are now blowing black smoke because there is too much unburnt fuel and incomplete combustion occurs (black smoke) this can be due to a bad turbo or a leaking injector which on some occasions can be heard in mornings as the vehicle will have a very loud knocking sound on initial start up, this is due to pre-injection and a bad injector.